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RETIREMENT BENEFIT PLANS - Schedule Of Projected Benefit Obligation (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
Pension Benefits  
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]  
Benefit obligation, beginning balance $ 0
Transtar acquisition 9,055
Service costs 712
Interest costs 108
Actuarial losses (gains) (20)
Benefits paid (50)
Benefit obligation, ending balance 9,805
Postretirement Benefits  
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]  
Benefit obligation, beginning balance 0
Transtar acquisition 28,488
Service costs 864
Interest costs 337
Actuarial losses (gains) 344
Benefits paid 0
Benefit obligation, ending balance $ 30,033